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/* align.c -- test alignment (important for 16-bit systems)
This file is part of the LZO real-time data compression library.
Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1996 Markus Franz Xaver Johannes Oberhumer
All Rights Reserved.
The LZO library is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
The LZO library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with the LZO library; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Markus F.X.J. Oberhumer
<markus@oberhumer.com>
http://www.oberhumer.com/opensource/lzo/
*/
#if 0
#include "src/lzo_conf.h"
#include "src/lzo_ptr.h"
#endif
#include "lzo/lzoconf.h"
/* utility layer */
#define WANT_LZO_MALLOC 1
#include "examples/portab.h"
int opt_verbose = 0;
/*************************************************************************
//
**************************************************************************/
long align_test(lzo_bytep block, lzo_uint len, lzo_uint step)
{
lzo_bytep b1 = block;
lzo_bytep b2 = block;
lzo_bytep k1 = NULL;
lzo_bytep k2 = NULL;
lzo_bytep k;
lzo_bytep x;
lzo_uint offset = 0;
long i = 0;
assert(step > 0);
assert(step <= 65536L);
assert((step & (step - 1)) == 0);
for (offset = step; offset < len; offset += step)
{
k1 = LZO_PTR_ALIGN_UP(b1+1,step);
k2 = b2 + offset;
if (k1 != k2)
{
printf("error 1: i %ld step %ld offset %ld: "
"%p (%ld) %p (%ld)\n",
i, (long) step, (long) offset,
k1, (long) (k1 - block),
k2, (long) (k2 - block));
return 0;
}
if (k1 - step != b1)
{
printf("error 2: i %ld step %ld offset %ld: "
"%p (%ld) %p (%ld)\n",
i, (long) step, (long) offset,
b1, (long) (b1 - block),
k1, (long) (k1 - block));
return 0;
}
assert(k1 > b1);
assert(k2 > b2);
assert((lzo_uint)(k2 - b2) == offset);
assert(k1 - offset == b2);
#if defined(PTR_ALIGNED_4)
if (step == 4)
{
assert(PTR_ALIGNED_4(k1));
assert(PTR_ALIGNED_4(k2));
assert(PTR_ALIGNED2_4(k1,k2));
}
#endif
#if defined(PTR_ALIGNED_8)
if (step == 8)
{
assert(PTR_ALIGNED_8(k1));
assert(PTR_ALIGNED_8(k2));
assert(PTR_ALIGNED2_8(k1,k2));
}
#endif
#if defined(PTR_LINEAR)
assert((PTR_LINEAR(k1) & (step-1)) == 0);
assert((PTR_LINEAR(k2) & (step-1)) == 0);
#endif
for (k = b1 + 1; k <= k1; k++)
{
x = LZO_PTR_ALIGN_UP(k,step);
if (x != k1)
{
printf("error 3: base: %p %p %p i %ld step %ld offset %ld: "
"%p (%ld) %p (%ld) %p (%ld)\n",
block, b1, b2,
i, (long) step, (long) offset,
k1, (long) (k1 - block),
k, (long) (k - block),
x, (long) (x - block));
return 0;
}
}
b1 = k1;
i++;
}
return i;
}
/*************************************************************************
//
**************************************************************************/
#define BLOCK_LEN (128*1024L)
int main(int argc, char *argv[])
{
lzo_bytep buf;
lzo_uint step;
if (argc >= 2 && strcmp(argv[1],"-v") == 0)
opt_verbose = 1;
if (lzo_init() != LZO_E_OK)
{
printf("lzo_init() failed !!!\n");
return 3;
}
buf = (lzo_bytep) lzo_malloc(2*BLOCK_LEN + 256);
if (buf == NULL)
{
printf("out of memory\n");
return 2;
}
printf("Align init: %p ( 0x%lx )\n", buf, (unsigned long) buf);
for (step = 1; step <= 65536L; step *= 2)
{
lzo_bytep block = buf;
long n;
unsigned gap;
gap = __lzo_align_gap(block,step);
block = LZO_PTR_ALIGN_UP(block,step);
if (opt_verbose >= 1)
printf("STEP %5ld: GAP: %5lu %p %p %5ld\n",
(long) step, (long) gap, buf, block,
(long) (block - buf));
n = align_test(block,BLOCK_LEN,step);
if (n == 0)
return 1;
if ((n + 1) * step != BLOCK_LEN)
{
printf("error 4: %ld %ld\n",(long)step,n);
return 1;
}
}
lzo_free(buf);
printf("Alignment test passed.\n");
return 0;
}
/*
vi:ts=4:et
*/
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